/Engine/Source/Runtime/MovieScene/Public/Evaluation/MovieSceneEvaluationField.h
Diff the active sequences this frame, with the specified previous frame's meta-data
void DiffSequences ( const [FMovieSceneEvaluationMetaData](API\Runtime\MovieScene\Evaluation\FMovieSceneEvaluationMetaData) & LastFrame, [TArray](API\Runtime\Core\Containers\TArray)< [FMovieSceneSequenceID](API\Runtime\MovieScene\FMovieSceneSequenceID) > * NewSequences, [TArray](API\Runtime\Core\Containers\TArray)< [FMovieSceneSequenceID](API\Runtime\MovieScene\FMovieSceneSequenceID) > * ExpiredSequences ) const